Bi-concave Lens

Bi-concave Lens


Bi-concave lens has a negative focal length and two concave surfaces with identical radii.

 

Common Specification
Material BK7/Fused Silica
Dimension Tolerance +0.0/-0.1 mm
Thickness Tolerance  ± 0.1 mm
Paraxial Focal Length ± 2%
Clear Aperture > 90%
Centration 3 arc minutes
Irregularity lambda/4 at 632.8 nm 
Surface Quality S/D 60-40
Bevel 0.2mmx45°
Coating According to the requirement
Part Number Material ф
(mm)
f
(mm)
R1=R2
(mm)
Tc
(mm)
Te
(mm)
fb
(mm)
BCV-BK7-D10.0-4.5ET-F-10 BK7  10 -10.0 10.7 2 4.5 -10.6
BCV-BK7-D12.7-4.6ET-F-15 BK7             12.7 -15.0 15.88 2 4.6 -15.6
BCV-BK7-D12.7-4.0ET-F-20 BK7 12.7 -20.0 21.07 2 4 -20.6
BCV-BK7-D12.7-3.6ET-F-25 BK7 12.7 -25.0 26.25 2 3.6 -25.7
BCV-BK7-D12.7-3.3ET-F-30 BK7 12.7 -30.00 31.44 2 3.3 -30.7
BCV-BK7-D12.7-3.0ET-F-40 BK7 12.7 -40.0 41.8 2 3 -40.7
BCV-BK7-D12.7-2.8ET-F-50 BK7 12.7 -50.0 52.17 2 2.8 -50.7
BCV-BK7-D25.4-6.5ET-F-35 BK7 25.4 -35.0 36.62 2 6.5 -35.7
BCV-BK7-D25.4-5.1ET-F-50 BK7 25.4 -50.0 52.17 2 5.1 -50.7
BCV-BK7-D25.4-4.1ET-F-75 BK7 25.4 -75.0 78.09 2 4.1 -75.7
BCV-BK7-D25.4-3.6ET-F-100 BK7 25.4 -100.0 104 2 3.6 -100.7
BCV-BK7-D25.4-3.2ET-F-125 BK7 25.4 -125.0 129.92 2 3.2 -125.7
BCV-BK7-D25.4-3.0ET-F-150 BK7 25.4 -150.0 155.83 2 3 -150.7
BCV-BK7-D25.4-2.9ET-F-175 BK7 25.4 -175.0 181.75 2 2.9 -175.7
BCV-BK7-D25.4-2.8ET-F-200 BK7 25.4 -200.0 207.66 2 2.8 -200.7
BCV-BK7-D25.4-2.6ET-F-250 BK7 25.4 -250.0 259.49 2 2.6 -250.7
BCV-BK7-D25.4-2.5ET-F-300 BK7 25.4 -300.0 311.32 2 2.5 -300.7
BCV-BK7-D25.4-2.3ET-F-500 BK7 25.4 -500.00 518.64 2 2.3 -500.7
BCV-BK7-D25.4-2.2ET-F-1000 BK7 25.4 -1000.000 1036.94 2 2.2 -1000.7
Part Number Material ф
(mm)
f
(mm)
R1=R2
(mm)
Tc
(mm)
Te
(mm)
fb
(mm)
BCV-JGS1-D12.7-5.0ET-F-15 Fused Silica 12.7 -15.0 14.11 2 5 -15.7
BCV-JGS1-D12.7-4.2ET-F-20 Fused Silica 12.7 -20.0 18.71 2 4.2 -20.7
BCV-JGS1-D12.7-3.7ET-F-25 Fused Silica 12.7 -25.0 23.32 2 3.7 -25.7
BCV-JGS1-D12.7-3.5ET-F-30 Fused Silica 12.7 -30.0 27.92 2 3.5 -30.7
BCV-JGS1-D12.7-3.1ET-F-40 Fused Silica 12.7 -40.0 37.12 2 3.1 -40.7
BCV-JGS1-D25.4-9.5ET-F-25 Fused Silica 25.4 -25.0 23.32 2 9.5 -25.7
BCV-JGS1-D25.4-7.2ET-F-35 Fused Silica 25.4 -35.0 32.52 2 7.2 -35.7
BCV-JGS1-D25.4-5.6ET-F-50 Fused Silica 25.4 -50.0 46.32 2 5.6 -50.7
BCV-JGS1-D25.4-4.3ET-F-75 Fused Silica 25.4 -75.0 69.33 2 4.3 -75.7
BCV-JGS1-D25.4-3.8ET-F-100 Fused Silica 25.4 -100.00 92.33 2 3.8 -100.7
BCV-JGS1-D25.4-3.2ET-F-150 Fused Silica 25.4 -150.0 138.34 2 3.2 -150.7
BCV-JGS1-D25.4-2.9ET-F-200 Fused Silica 25.4 -200.0 184.35 2 2.9 -200.7
BCV-JGS1-D25.4-2.7ET-F-250 Fused Silica 25.4 -250.0 230.36 2 2.7 -250.7
BCV-JGS1-D25.4-2.6ET-F-300 Fused Silica 25.4 -300.00 276.36 2 2.6 -300.7
BCV-JGS1-D25.4-2.4ET-F-500 Fused Silica 25.4 -500.000 460.4 2 2.4 -500.7
BCV-JGS1-D25.4-2.2ET-F-1000 Fused Silica 25.4 -1000.0 920.48 2 2.2 -1000.7